Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/cifsfs.c |
| 3 | * |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * Common Internet FileSystem (CIFS) client |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/mount.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/seq_file.h> |
| 33 | #include <linux/vfs.h> |
| 34 | #include <linux/mempool.h> |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 35 | #include <linux/delay.h> |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 36 | #include <linux/kthread.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 37 | #include <linux/freezer.h> |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 38 | #include <linux/namei.h> |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 39 | #include <linux/random.h> |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 40 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "cifsfs.h" |
| 42 | #include "cifspdu.h" |
| 43 | #define DECLARE_GLOBALS_HERE |
| 44 | #include "cifsglob.h" |
| 45 | #include "cifsproto.h" |
| 46 | #include "cifs_debug.h" |
| 47 | #include "cifs_fs_sb.h" |
| 48 | #include <linux/mm.h> |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 49 | #include <linux/key-type.h> |
Jeff Layton | e545937 | 2007-11-03 05:11:06 +0000 | [diff] [blame] | 50 | #include "cifs_spnego.h" |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 51 | #include "fscache.h" |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 52 | #ifdef CONFIG_CIFS_SMB2 |
| 53 | #include "smb2pdu.h" |
| 54 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int cifsFYI = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | int traceSMB = 0; |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 58 | bool enable_oplocks = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | unsigned int linuxExtEnabled = 1; |
| 60 | unsigned int lookupCacheEnabled = 1; |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 61 | unsigned int global_secflags = CIFSSEC_DEF; |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 62 | /* unsigned int ntlmv2_support = 0; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | unsigned int sign_CIFS_PDUs = 1; |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 64 | static const struct super_operations cifs_super_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 66 | module_param(CIFSMaxBufSize, uint, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 67 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
| 68 | "Default: 16384 Range: 8192 to 130048"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 70 | module_param(cifs_min_rcv, uint, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 71 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
| 72 | "1 to 64"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | unsigned int cifs_min_small = 30; |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 74 | module_param(cifs_min_small, uint, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 75 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
| 76 | "Range: 2 to 256"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 78 | module_param(cifs_max_pending, uint, 0444); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 79 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
Pavel Shilovsky | 10b9b98 | 2012-03-20 12:55:09 +0300 | [diff] [blame] | 80 | "Default: 32767 Range: 2 to 32767."); |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 81 | module_param(enable_oplocks, bool, 0644); |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 82 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | extern mempool_t *cifs_sm_req_poolp; |
| 85 | extern mempool_t *cifs_req_poolp; |
| 86 | extern mempool_t *cifs_mid_poolp; |
| 87 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 88 | struct workqueue_struct *cifsiod_wq; |
| 89 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 90 | #ifdef CONFIG_CIFS_SMB2 |
| 91 | __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE]; |
| 92 | #endif |
| 93 | |
Mateusz Guzik | 24261fc | 2013-03-08 16:30:03 +0100 | [diff] [blame] | 94 | /* |
| 95 | * Bumps refcount for cifs super block. |
| 96 | * Note that it should be only called if a referece to VFS super block is |
| 97 | * already held, e.g. in open-type syscalls context. Otherwise it can race with |
| 98 | * atomic_dec_and_test in deactivate_locked_super. |
| 99 | */ |
| 100 | void |
| 101 | cifs_sb_active(struct super_block *sb) |
| 102 | { |
| 103 | struct cifs_sb_info *server = CIFS_SB(sb); |
| 104 | |
| 105 | if (atomic_inc_return(&server->active) == 1) |
| 106 | atomic_inc(&sb->s_active); |
| 107 | } |
| 108 | |
| 109 | void |
| 110 | cifs_sb_deactive(struct super_block *sb) |
| 111 | { |
| 112 | struct cifs_sb_info *server = CIFS_SB(sb); |
| 113 | |
| 114 | if (atomic_dec_and_test(&server->active)) |
| 115 | deactivate_super(sb); |
| 116 | } |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | static int |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 119 | cifs_read_super(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
| 121 | struct inode *inode; |
Pavel Shilovsky | b2e5cd3 | 2011-05-25 13:35:34 +0400 | [diff] [blame] | 122 | struct cifs_sb_info *cifs_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | int rc = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 124 | |
Pavel Shilovsky | b2e5cd3 | 2011-05-25 13:35:34 +0400 | [diff] [blame] | 125 | cifs_sb = CIFS_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 127 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
| 128 | sb->s_flags |= MS_POSIXACL; |
| 129 | |
| 130 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) |
| 131 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 132 | else |
| 133 | sb->s_maxbytes = MAX_NON_LFS; |
| 134 | |
| 135 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
| 136 | sb->s_time_gran = 100; |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | sb->s_magic = CIFS_MAGIC_NUMBER; |
| 139 | sb->s_op = &cifs_super_ops; |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 140 | sb->s_bdi = &cifs_sb->bdi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
| 142 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
Shirish Pargaonkar | 9b6763e | 2011-02-21 23:56:59 -0600 | [diff] [blame] | 143 | inode = cifs_root_iget(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 145 | if (IS_ERR(inode)) { |
| 146 | rc = PTR_ERR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | goto out_no_root; |
| 148 | } |
| 149 | |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 150 | sb->s_root = d_make_root(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | if (!sb->s_root) { |
| 152 | rc = -ENOMEM; |
| 153 | goto out_no_root; |
| 154 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 155 | |
Sedat Dilek | ea4b574 | 2012-04-28 14:13:53 +0200 | [diff] [blame] | 156 | /* do that *after* d_make_root() - we want NULL ->d_op for root here */ |
Al Viro | 1c929cf | 2010-12-18 11:43:51 -0500 | [diff] [blame] | 157 | if (cifs_sb_master_tcon(cifs_sb)->nocase) |
| 158 | sb->s_d_op = &cifs_ci_dentry_ops; |
| 159 | else |
| 160 | sb->s_d_op = &cifs_dentry_ops; |
| 161 | |
Paul Bolle | f3a6a60 | 2011-10-12 14:14:04 +0200 | [diff] [blame] | 162 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
Steve French | 7521a3c | 2007-07-11 18:30:34 +0000 | [diff] [blame] | 163 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 164 | cifs_dbg(FYI, "export ops supported\n"); |
Steve French | 7521a3c | 2007-07-11 18:30:34 +0000 | [diff] [blame] | 165 | sb->s_export_op = &cifs_export_ops; |
| 166 | } |
Paul Bolle | f3a6a60 | 2011-10-12 14:14:04 +0200 | [diff] [blame] | 167 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | return 0; |
| 170 | |
| 171 | out_no_root: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 172 | cifs_dbg(VFS, "%s: get root inode failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | return rc; |
| 174 | } |
| 175 | |
Al Viro | 6d68617 | 2011-06-17 08:34:57 -0400 | [diff] [blame] | 176 | static void cifs_kill_sb(struct super_block *sb) |
| 177 | { |
| 178 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 179 | kill_anon_super(sb); |
Al Viro | 98ab494 | 2011-06-17 09:32:10 -0400 | [diff] [blame] | 180 | cifs_umount(cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | static int |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 184 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 186 | struct super_block *sb = dentry->d_sb; |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 187 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 188 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 189 | struct TCP_Server_Info *server = tcon->ses->server; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 190 | unsigned int xid; |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 191 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 193 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 195 | /* |
| 196 | * PATH_MAX may be too long - it would presumably be total path, |
| 197 | * but note that some servers (includinng Samba 3) have a shorter |
| 198 | * maximum path. |
| 199 | * |
| 200 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. |
| 201 | */ |
| 202 | buf->f_namelen = PATH_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | buf->f_files = 0; /* undefined */ |
| 204 | buf->f_ffree = 0; /* unlimited */ |
| 205 | |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 206 | if (server->ops->queryfs) |
| 207 | rc = server->ops->queryfs(xid, tcon, buf); |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 208 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 209 | free_xid(xid); |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 210 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 213 | static int cifs_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
| 215 | struct cifs_sb_info *cifs_sb; |
| 216 | |
| 217 | cifs_sb = CIFS_SB(inode->i_sb); |
| 218 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 219 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
| 220 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 221 | return -EACCES; |
| 222 | else |
| 223 | return 0; |
| 224 | } else /* file mode might have been restricted at mount time |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 225 | on the client (above and beyond ACL on servers) for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | servers which do not support setting and viewing mode bits, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 227 | so allowing client to check permissions is useful */ |
Al Viro | 2830ba7 | 2011-06-20 19:16:29 -0400 | [diff] [blame] | 228 | return generic_permission(inode, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 231 | static struct kmem_cache *cifs_inode_cachep; |
| 232 | static struct kmem_cache *cifs_req_cachep; |
| 233 | static struct kmem_cache *cifs_mid_cachep; |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 234 | static struct kmem_cache *cifs_sm_req_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | mempool_t *cifs_sm_req_poolp; |
| 236 | mempool_t *cifs_req_poolp; |
| 237 | mempool_t *cifs_mid_poolp; |
| 238 | |
| 239 | static struct inode * |
| 240 | cifs_alloc_inode(struct super_block *sb) |
| 241 | { |
| 242 | struct cifsInodeInfo *cifs_inode; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 243 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | if (!cifs_inode) |
| 245 | return NULL; |
| 246 | cifs_inode->cifsAttrs = 0x20; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | cifs_inode->time = 0; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 248 | /* |
| 249 | * Until the file is open and we have gotten oplock info back from the |
| 250 | * server, can not assume caching of file data or metadata. |
| 251 | */ |
Pavel Shilovsky | c672362 | 2010-11-03 10:58:57 +0300 | [diff] [blame] | 252 | cifs_set_oplock_level(cifs_inode, 0); |
Jeff Layton | 9a8165f | 2008-10-17 21:03:20 -0400 | [diff] [blame] | 253 | cifs_inode->delete_pending = false; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 254 | cifs_inode->invalid_mapping = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 256 | cifs_inode->server_eof = 0; |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 257 | cifs_inode->uniqueid = 0; |
| 258 | cifs_inode->createtime = 0; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 259 | #ifdef CONFIG_CIFS_SMB2 |
| 260 | get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); |
| 261 | #endif |
| 262 | /* |
| 263 | * Can not set i_flags here - they get immediately overwritten to zero |
| 264 | * by the VFS. |
| 265 | */ |
| 266 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
Pavel Shilovsky | f45d341 | 2012-09-19 06:22:43 -0700 | [diff] [blame] | 268 | INIT_LIST_HEAD(&cifs_inode->llist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return &cifs_inode->vfs_inode; |
| 270 | } |
| 271 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 272 | static void cifs_i_callback(struct rcu_head *head) |
| 273 | { |
| 274 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 275 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
| 276 | } |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | static void |
| 279 | cifs_destroy_inode(struct inode *inode) |
| 280 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 281 | call_rcu(&inode->i_rcu, cifs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 284 | static void |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 285 | cifs_evict_inode(struct inode *inode) |
Suresh Jayaraman | 9451a9a | 2010-07-05 18:12:45 +0530 | [diff] [blame] | 286 | { |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 287 | truncate_inode_pages(&inode->i_data, 0); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 288 | clear_inode(inode); |
Suresh Jayaraman | 9451a9a | 2010-07-05 18:12:45 +0530 | [diff] [blame] | 289 | cifs_fscache_release_inode_cookie(inode); |
| 290 | } |
| 291 | |
| 292 | static void |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 293 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) |
| 294 | { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 295 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
| 296 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; |
| 297 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 298 | seq_printf(s, ",addr="); |
| 299 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 300 | switch (server->dstaddr.ss_family) { |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 301 | case AF_INET: |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 302 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 303 | break; |
| 304 | case AF_INET6: |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 305 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
| 306 | if (sa6->sin6_scope_id) |
| 307 | seq_printf(s, "%%%u", sa6->sin6_scope_id); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 308 | break; |
| 309 | default: |
| 310 | seq_printf(s, "(unknown)"); |
| 311 | } |
| 312 | } |
| 313 | |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 314 | static void |
| 315 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) |
| 316 | { |
| 317 | seq_printf(s, ",sec="); |
| 318 | |
| 319 | switch (server->secType) { |
| 320 | case LANMAN: |
| 321 | seq_printf(s, "lanman"); |
| 322 | break; |
| 323 | case NTLMv2: |
| 324 | seq_printf(s, "ntlmv2"); |
| 325 | break; |
| 326 | case NTLM: |
| 327 | seq_printf(s, "ntlm"); |
| 328 | break; |
| 329 | case Kerberos: |
| 330 | seq_printf(s, "krb5"); |
| 331 | break; |
| 332 | case RawNTLMSSP: |
| 333 | seq_printf(s, "ntlmssp"); |
| 334 | break; |
| 335 | default: |
| 336 | /* shouldn't ever happen */ |
| 337 | seq_printf(s, "unknown"); |
| 338 | break; |
| 339 | } |
| 340 | |
| 341 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
| 342 | seq_printf(s, "i"); |
| 343 | } |
| 344 | |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 345 | static void |
| 346 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) |
| 347 | { |
| 348 | seq_printf(s, ",cache="); |
| 349 | |
| 350 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) |
| 351 | seq_printf(s, "strict"); |
| 352 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
| 353 | seq_printf(s, "none"); |
| 354 | else |
| 355 | seq_printf(s, "loose"); |
| 356 | } |
| 357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | /* |
| 359 | * cifs_show_options() is for displaying mount options in /proc/mounts. |
| 360 | * Not all settable options are displayed but most of the important |
| 361 | * ones are. |
| 362 | */ |
| 363 | static int |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 364 | cifs_show_options(struct seq_file *s, struct dentry *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 366 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 367 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 368 | struct sockaddr *srcaddr; |
| 369 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 371 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 372 | cifs_show_security(s, tcon->ses->server); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 373 | cifs_show_cache_flavor(s, cifs_sb); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 374 | |
Sachin Prabhu | ecdb69e | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 375 | seq_printf(s, ",unc="); |
| 376 | seq_escape(s, tcon->treeName, " \t\n\\"); |
Jeff Layton | 29e07c8 | 2010-09-29 19:51:12 -0400 | [diff] [blame] | 377 | |
| 378 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) |
| 379 | seq_printf(s, ",multiuser"); |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 380 | else if (tcon->ses->user_name) |
| 381 | seq_printf(s, ",username=%s", tcon->ses->user_name); |
Jeff Layton | 29e07c8 | 2010-09-29 19:51:12 -0400 | [diff] [blame] | 382 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 383 | if (tcon->ses->domainName) |
| 384 | seq_printf(s, ",domain=%s", tcon->ses->domainName); |
| 385 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 386 | if (srcaddr->sa_family != AF_UNSPEC) { |
| 387 | struct sockaddr_in *saddr4; |
| 388 | struct sockaddr_in6 *saddr6; |
| 389 | saddr4 = (struct sockaddr_in *)srcaddr; |
| 390 | saddr6 = (struct sockaddr_in6 *)srcaddr; |
| 391 | if (srcaddr->sa_family == AF_INET6) |
| 392 | seq_printf(s, ",srcaddr=%pI6c", |
| 393 | &saddr6->sin6_addr); |
| 394 | else if (srcaddr->sa_family == AF_INET) |
| 395 | seq_printf(s, ",srcaddr=%pI4", |
| 396 | &saddr4->sin_addr.s_addr); |
| 397 | else |
| 398 | seq_printf(s, ",srcaddr=BAD-AF:%i", |
| 399 | (int)(srcaddr->sa_family)); |
| 400 | } |
| 401 | |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 402 | seq_printf(s, ",uid=%u", |
| 403 | from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 404 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
| 405 | seq_printf(s, ",forceuid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 406 | else |
| 407 | seq_printf(s, ",noforceuid"); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 408 | |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 409 | seq_printf(s, ",gid=%u", |
| 410 | from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
| 412 | seq_printf(s, ",forcegid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 413 | else |
| 414 | seq_printf(s, ",noforcegid"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 415 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 416 | cifs_show_address(s, tcon->ses->server); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 417 | |
| 418 | if (!tcon->unix_ext) |
Al Viro | 5206efd | 2011-07-26 03:22:14 -0400 | [diff] [blame] | 419 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 420 | cifs_sb->mnt_file_mode, |
| 421 | cifs_sb->mnt_dir_mode); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 422 | if (tcon->seal) |
| 423 | seq_printf(s, ",seal"); |
| 424 | if (tcon->nocase) |
| 425 | seq_printf(s, ",nocase"); |
| 426 | if (tcon->retry) |
| 427 | seq_printf(s, ",hard"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 428 | if (tcon->unix_ext) |
| 429 | seq_printf(s, ",unix"); |
| 430 | else |
| 431 | seq_printf(s, ",nounix"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 432 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
| 433 | seq_printf(s, ",posixpaths"); |
| 434 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
| 435 | seq_printf(s, ",setuids"); |
| 436 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 437 | seq_printf(s, ",serverino"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 438 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
| 439 | seq_printf(s, ",rwpidforward"); |
| 440 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) |
| 441 | seq_printf(s, ",forcemand"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 442 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
| 443 | seq_printf(s, ",nouser_xattr"); |
| 444 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
| 445 | seq_printf(s, ",mapchars"); |
| 446 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
| 447 | seq_printf(s, ",sfu"); |
| 448 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 449 | seq_printf(s, ",nobrl"); |
| 450 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| 451 | seq_printf(s, ",cifsacl"); |
| 452 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
| 453 | seq_printf(s, ",dynperm"); |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 454 | if (root->d_sb->s_flags & MS_POSIXACL) |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 455 | seq_printf(s, ",acl"); |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 456 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
| 457 | seq_printf(s, ",mfsymlinks"); |
Suresh Jayaraman | 476428f | 2010-11-24 17:49:07 +0530 | [diff] [blame] | 458 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
| 459 | seq_printf(s, ",fsc"); |
Steve French | 71c424b | 2011-10-19 20:44:48 -0500 | [diff] [blame] | 460 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
| 461 | seq_printf(s, ",nostrictsync"); |
| 462 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
| 463 | seq_printf(s, ",noperm"); |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 464 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 465 | seq_printf(s, ",backupuid=%u", |
| 466 | from_kuid_munged(&init_user_ns, |
| 467 | cifs_sb->mnt_backupuid)); |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 468 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 469 | seq_printf(s, ",backupgid=%u", |
| 470 | from_kgid_munged(&init_user_ns, |
| 471 | cifs_sb->mnt_backupgid)); |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 472 | |
Sachin Prabhu | 28f8881 | 2012-04-24 15:28:30 +0100 | [diff] [blame] | 473 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
| 474 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 475 | /* convert actimeo and display it in seconds */ |
Sachin Prabhu | 156d179 | 2012-04-25 12:10:14 +0100 | [diff] [blame] | 476 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return 0; |
| 479 | } |
| 480 | |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 481 | static void cifs_umount_begin(struct super_block *sb) |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 482 | { |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 483 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 484 | struct cifs_tcon *tcon; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 485 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 486 | if (cifs_sb == NULL) |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 487 | return; |
| 488 | |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 489 | tcon = cifs_sb_master_tcon(cifs_sb); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 490 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 491 | spin_lock(&cifs_tcp_ses_lock); |
Steve French | ad8034f | 2009-06-26 03:25:49 +0000 | [diff] [blame] | 492 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
| 493 | /* we have other mounts to same share or we have |
| 494 | already tried to force umount this and woken up |
| 495 | all waiting network requests, nothing to do */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 496 | spin_unlock(&cifs_tcp_ses_lock); |
Steve French | ad8034f | 2009-06-26 03:25:49 +0000 | [diff] [blame] | 497 | return; |
| 498 | } else if (tcon->tc_count == 1) |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 499 | tcon->tidStatus = CifsExiting; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 500 | spin_unlock(&cifs_tcp_ses_lock); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 501 | |
Steve French | 3a5ff61 | 2006-07-14 22:37:11 +0000 | [diff] [blame] | 502 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 503 | /* cancel_notify_requests(tcon); */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 504 | if (tcon->ses && tcon->ses->server) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 505 | cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 506 | wake_up_all(&tcon->ses->server->request_q); |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 507 | wake_up_all(&tcon->ses->server->response_q); |
| 508 | msleep(1); /* yield */ |
| 509 | /* we have to kick the requests once more */ |
| 510 | wake_up_all(&tcon->ses->server->response_q); |
| 511 | msleep(1); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 512 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 513 | |
| 514 | return; |
| 515 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 516 | |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 517 | #ifdef CONFIG_CIFS_STATS2 |
Al Viro | 6413237 | 2011-12-08 20:51:13 -0500 | [diff] [blame] | 518 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 519 | { |
| 520 | /* BB FIXME */ |
| 521 | return 0; |
| 522 | } |
| 523 | #endif |
| 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
| 526 | { |
| 527 | *flags |= MS_NODIRATIME; |
| 528 | return 0; |
| 529 | } |
| 530 | |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 531 | static int cifs_drop_inode(struct inode *inode) |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 532 | { |
| 533 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 534 | |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 535 | /* no serverino => unconditional eviction */ |
| 536 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || |
| 537 | generic_drop_inode(inode); |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 538 | } |
| 539 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 540 | static const struct super_operations cifs_super_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | .statfs = cifs_statfs, |
| 542 | .alloc_inode = cifs_alloc_inode, |
| 543 | .destroy_inode = cifs_destroy_inode, |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 544 | .drop_inode = cifs_drop_inode, |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 545 | .evict_inode = cifs_evict_inode, |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 546 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
| 547 | function unless later we add lazy close of inodes or unless the |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 548 | kernel forgets to call us with the same number of releases (closes) |
| 549 | as opens */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | .show_options = cifs_show_options, |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 551 | .umount_begin = cifs_umount_begin, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | .remount_fs = cifs_remount, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 553 | #ifdef CONFIG_CIFS_STATS2 |
Steve French | f46d3e1 | 2006-09-30 01:08:55 +0000 | [diff] [blame] | 554 | .show_stats = cifs_show_stats, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 555 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | }; |
| 557 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 558 | /* |
| 559 | * Get root dentry from superblock according to prefix path mount option. |
| 560 | * Return dentry with refcount + 1 on success and NULL otherwise. |
| 561 | */ |
| 562 | static struct dentry * |
| 563 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) |
| 564 | { |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 565 | struct dentry *dentry; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 566 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 567 | char *full_path = NULL; |
| 568 | char *s, *p; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 569 | char sep; |
| 570 | |
Steve French | 6d3ea7e | 2012-11-28 22:34:41 -0600 | [diff] [blame] | 571 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
| 572 | cifs_sb_master_tcon(cifs_sb)); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 573 | if (full_path == NULL) |
Al Viro | 9403c9c | 2011-06-17 10:02:59 -0400 | [diff] [blame] | 574 | return ERR_PTR(-ENOMEM); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 575 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 576 | cifs_dbg(FYI, "Get root dentry for %s\n", full_path); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 577 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 578 | sep = CIFS_DIR_SEP(cifs_sb); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 579 | dentry = dget(sb->s_root); |
| 580 | p = s = full_path; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 581 | |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 582 | do { |
| 583 | struct inode *dir = dentry->d_inode; |
| 584 | struct dentry *child; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 585 | |
Pavel Shilovsky | 5b980b0 | 2011-08-21 19:30:15 +0400 | [diff] [blame] | 586 | if (!dir) { |
| 587 | dput(dentry); |
| 588 | dentry = ERR_PTR(-ENOENT); |
| 589 | break; |
| 590 | } |
Jeff Layton | ce2ac52 | 2013-02-01 15:11:01 -0500 | [diff] [blame] | 591 | if (!S_ISDIR(dir->i_mode)) { |
| 592 | dput(dentry); |
| 593 | dentry = ERR_PTR(-ENOTDIR); |
| 594 | break; |
| 595 | } |
Pavel Shilovsky | 5b980b0 | 2011-08-21 19:30:15 +0400 | [diff] [blame] | 596 | |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 597 | /* skip separators */ |
| 598 | while (*s == sep) |
| 599 | s++; |
| 600 | if (!*s) |
| 601 | break; |
| 602 | p = s++; |
| 603 | /* next separator */ |
| 604 | while (*s && *s != sep) |
| 605 | s++; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 606 | |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 607 | mutex_lock(&dir->i_mutex); |
| 608 | child = lookup_one_len(p, dentry, s - p); |
| 609 | mutex_unlock(&dir->i_mutex); |
| 610 | dput(dentry); |
| 611 | dentry = child; |
| 612 | } while (!IS_ERR(dentry)); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 613 | kfree(full_path); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 614 | return dentry; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 615 | } |
| 616 | |
Al Viro | ee01a14 | 2011-06-17 09:47:23 -0400 | [diff] [blame] | 617 | static int cifs_set_super(struct super_block *sb, void *data) |
| 618 | { |
| 619 | struct cifs_mnt_data *mnt_data = data; |
| 620 | sb->s_fs_info = mnt_data->cifs_sb; |
| 621 | return set_anon_super(sb, NULL); |
| 622 | } |
| 623 | |
Al Viro | d753ed9 | 2010-07-26 12:52:33 +0400 | [diff] [blame] | 624 | static struct dentry * |
| 625 | cifs_do_mount(struct file_system_type *fs_type, |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 626 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | { |
| 628 | int rc; |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 629 | struct super_block *sb; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 630 | struct cifs_sb_info *cifs_sb; |
| 631 | struct smb_vol *volume_info; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 632 | struct cifs_mnt_data mnt_data; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 633 | struct dentry *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 635 | cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 637 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
| 638 | if (IS_ERR(volume_info)) |
| 639 | return ERR_CAST(volume_info); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 640 | |
| 641 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
| 642 | if (cifs_sb == NULL) { |
| 643 | root = ERR_PTR(-ENOMEM); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 644 | goto out_nls; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 645 | } |
| 646 | |
Al Viro | 5d3bc60 | 2011-06-17 09:17:28 -0400 | [diff] [blame] | 647 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
| 648 | if (cifs_sb->mountdata == NULL) { |
| 649 | root = ERR_PTR(-ENOMEM); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 650 | goto out_cifs_sb; |
Al Viro | 5d3bc60 | 2011-06-17 09:17:28 -0400 | [diff] [blame] | 651 | } |
| 652 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 653 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
| 654 | |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 655 | rc = cifs_mount(cifs_sb, volume_info); |
| 656 | if (rc) { |
| 657 | if (!(flags & MS_SILENT)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 658 | cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", |
| 659 | rc); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 660 | root = ERR_PTR(rc); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 661 | goto out_mountdata; |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 662 | } |
| 663 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 664 | mnt_data.vol = volume_info; |
| 665 | mnt_data.cifs_sb = cifs_sb; |
| 666 | mnt_data.flags = flags; |
| 667 | |
David Howells | 9249e17 | 2012-06-25 12:55:37 +0100 | [diff] [blame] | 668 | /* BB should we make this contingent on mount parm? */ |
| 669 | flags |= MS_NODIRATIME | MS_NOATIME; |
| 670 | |
| 671 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 672 | if (IS_ERR(sb)) { |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 673 | root = ERR_CAST(sb); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 674 | cifs_umount(cifs_sb); |
Al Viro | d757d71 | 2011-06-17 09:42:43 -0400 | [diff] [blame] | 675 | goto out; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 676 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
Al Viro | ee01a14 | 2011-06-17 09:47:23 -0400 | [diff] [blame] | 678 | if (sb->s_root) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 679 | cifs_dbg(FYI, "Use existing superblock\n"); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 680 | cifs_umount(cifs_sb); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 681 | } else { |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 682 | rc = cifs_read_super(sb); |
| 683 | if (rc) { |
| 684 | root = ERR_PTR(rc); |
| 685 | goto out_super; |
| 686 | } |
| 687 | |
| 688 | sb->s_flags |= MS_ACTIVE; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 689 | } |
| 690 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 691 | root = cifs_get_root(volume_info, sb); |
Al Viro | 9403c9c | 2011-06-17 10:02:59 -0400 | [diff] [blame] | 692 | if (IS_ERR(root)) |
Al Viro | fa18f1b | 2011-06-17 09:50:44 -0400 | [diff] [blame] | 693 | goto out_super; |
Al Viro | fa18f1b | 2011-06-17 09:50:44 -0400 | [diff] [blame] | 694 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 695 | cifs_dbg(FYI, "dentry root is: %p\n", root); |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 696 | goto out; |
| 697 | |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 698 | out_super: |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 699 | deactivate_locked_super(sb); |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 700 | out: |
Jeff Layton | f9e59bc | 2011-07-06 08:10:37 -0400 | [diff] [blame] | 701 | cifs_cleanup_volume_info(volume_info); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 702 | return root; |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 703 | |
| 704 | out_mountdata: |
| 705 | kfree(cifs_sb->mountdata); |
| 706 | out_cifs_sb: |
| 707 | kfree(cifs_sb); |
| 708 | out_nls: |
| 709 | unload_nls(volume_info->local_nls); |
| 710 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | } |
| 712 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 713 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 714 | unsigned long nr_segs, loff_t pos) |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 715 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 716 | struct inode *inode = file_inode(iocb->ki_filp); |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 717 | ssize_t written; |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 718 | int rc; |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 719 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 720 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 721 | |
| 722 | if (CIFS_I(inode)->clientCanCacheAll) |
| 723 | return written; |
| 724 | |
| 725 | rc = filemap_fdatawrite(inode->i_mapping); |
| 726 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 727 | cifs_dbg(FYI, "cifs_file_aio_write: %d rc on %p inode\n", |
| 728 | rc, inode); |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 729 | |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 730 | return written; |
| 731 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 733 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 734 | { |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 735 | /* |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 736 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 737 | * the cached file length |
| 738 | */ |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 739 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 740 | int rc; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 741 | struct inode *inode = file_inode(file); |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 742 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 743 | /* |
| 744 | * We need to be sure that all dirty pages are written and the |
| 745 | * server has the newest file length. |
| 746 | */ |
| 747 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && |
| 748 | inode->i_mapping->nrpages != 0) { |
| 749 | rc = filemap_fdatawait(inode->i_mapping); |
Steve French | 156ecb2 | 2011-05-20 17:00:01 +0000 | [diff] [blame] | 750 | if (rc) { |
| 751 | mapping_set_error(inode->i_mapping, rc); |
| 752 | return rc; |
| 753 | } |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 754 | } |
| 755 | /* |
| 756 | * Some applications poll for the file length in this strange |
| 757 | * way so we must seek to end on non-oplocked files by |
| 758 | * setting the revalidate time to zero. |
| 759 | */ |
| 760 | CIFS_I(inode)->time = 0; |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 761 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 762 | rc = cifs_revalidate_file_attr(file); |
| 763 | if (rc < 0) |
| 764 | return (loff_t)rc; |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 765 | } |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 766 | return generic_file_llseek(file, offset, whence); |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 767 | } |
| 768 | |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 769 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
| 770 | { |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 771 | /* note that this is called by vfs setlease with lock_flocks held |
| 772 | to protect *lease from going away */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 773 | struct inode *inode = file_inode(file); |
Jeff Layton | ba00ba6 | 2010-09-20 16:01:31 -0700 | [diff] [blame] | 774 | struct cifsFileInfo *cfile = file->private_data; |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 775 | |
| 776 | if (!(S_ISREG(inode->i_mode))) |
| 777 | return -EINVAL; |
| 778 | |
| 779 | /* check if file is oplocked */ |
| 780 | if (((arg == F_RDLCK) && |
| 781 | (CIFS_I(inode)->clientCanCacheRead)) || |
| 782 | ((arg == F_WRLCK) && |
| 783 | (CIFS_I(inode)->clientCanCacheAll))) |
| 784 | return generic_setlease(file, arg, lease); |
Jeff Layton | 13cfb73 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 785 | else if (tlink_tcon(cfile->tlink)->local_lease && |
| 786 | !CIFS_I(inode)->clientCanCacheRead) |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 787 | /* If the server claims to support oplock on this |
| 788 | file, then we still need to check oplock even |
| 789 | if the local_lease mount option is set, but there |
| 790 | are servers which do not support oplock for which |
| 791 | this mount option may be useful if the user |
| 792 | knows that the file won't be changed on the server |
| 793 | by anyone else */ |
| 794 | return generic_setlease(file, arg, lease); |
Christoph Hellwig | 51ee4b8 | 2010-10-31 08:35:10 -0400 | [diff] [blame] | 795 | else |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 796 | return -EAGAIN; |
| 797 | } |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 798 | |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 799 | struct file_system_type cifs_fs_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | .owner = THIS_MODULE, |
| 801 | .name = "cifs", |
Al Viro | d753ed9 | 2010-07-26 12:52:33 +0400 | [diff] [blame] | 802 | .mount = cifs_do_mount, |
Al Viro | 6d68617 | 2011-06-17 08:34:57 -0400 | [diff] [blame] | 803 | .kill_sb = cifs_kill_sb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | /* .fs_flags */ |
| 805 | }; |
Eric W. Biederman | 3e64fe5 | 2013-03-11 07:05:42 -0700 | [diff] [blame] | 806 | MODULE_ALIAS_FS("cifs"); |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 807 | const struct inode_operations cifs_dir_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | .create = cifs_create, |
Miklos Szeredi | d2c1271 | 2012-06-05 15:10:23 +0200 | [diff] [blame] | 809 | .atomic_open = cifs_atomic_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | .lookup = cifs_lookup, |
| 811 | .getattr = cifs_getattr, |
| 812 | .unlink = cifs_unlink, |
| 813 | .link = cifs_hardlink, |
| 814 | .mkdir = cifs_mkdir, |
| 815 | .rmdir = cifs_rmdir, |
| 816 | .rename = cifs_rename, |
| 817 | .permission = cifs_permission, |
| 818 | /* revalidate:cifs_revalidate, */ |
| 819 | .setattr = cifs_setattr, |
| 820 | .symlink = cifs_symlink, |
| 821 | .mknod = cifs_mknod, |
| 822 | #ifdef CONFIG_CIFS_XATTR |
| 823 | .setxattr = cifs_setxattr, |
| 824 | .getxattr = cifs_getxattr, |
| 825 | .listxattr = cifs_listxattr, |
| 826 | .removexattr = cifs_removexattr, |
| 827 | #endif |
| 828 | }; |
| 829 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 830 | const struct inode_operations cifs_file_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | /* revalidate:cifs_revalidate, */ |
| 832 | .setattr = cifs_setattr, |
| 833 | .getattr = cifs_getattr, /* do we need this anymore? */ |
| 834 | .rename = cifs_rename, |
| 835 | .permission = cifs_permission, |
| 836 | #ifdef CONFIG_CIFS_XATTR |
| 837 | .setxattr = cifs_setxattr, |
| 838 | .getxattr = cifs_getxattr, |
| 839 | .listxattr = cifs_listxattr, |
| 840 | .removexattr = cifs_removexattr, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 841 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | }; |
| 843 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 844 | const struct inode_operations cifs_symlink_inode_ops = { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 845 | .readlink = generic_readlink, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | .follow_link = cifs_follow_link, |
| 847 | .put_link = cifs_put_link, |
| 848 | .permission = cifs_permission, |
| 849 | /* BB add the following two eventually */ |
| 850 | /* revalidate: cifs_revalidate, |
| 851 | setattr: cifs_notify_change, *//* BB do we need notify change */ |
| 852 | #ifdef CONFIG_CIFS_XATTR |
| 853 | .setxattr = cifs_setxattr, |
| 854 | .getxattr = cifs_getxattr, |
| 855 | .listxattr = cifs_listxattr, |
| 856 | .removexattr = cifs_removexattr, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 857 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | }; |
| 859 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 860 | const struct file_operations cifs_file_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 861 | .read = do_sync_read, |
| 862 | .write = do_sync_write, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 863 | .aio_read = generic_file_aio_read, |
| 864 | .aio_write = cifs_file_aio_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | .open = cifs_open, |
| 866 | .release = cifs_close, |
| 867 | .lock = cifs_lock, |
| 868 | .fsync = cifs_fsync, |
| 869 | .flush = cifs_flush, |
| 870 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 871 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 872 | .llseek = cifs_llseek, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 873 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 874 | .unlocked_ioctl = cifs_ioctl, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 875 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 876 | .setlease = cifs_setlease, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | }; |
| 878 | |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 879 | const struct file_operations cifs_file_strict_ops = { |
| 880 | .read = do_sync_read, |
| 881 | .write = do_sync_write, |
Pavel Shilovsky | a70307e | 2010-12-14 11:50:41 +0300 | [diff] [blame] | 882 | .aio_read = cifs_strict_readv, |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 883 | .aio_write = cifs_strict_writev, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 884 | .open = cifs_open, |
| 885 | .release = cifs_close, |
| 886 | .lock = cifs_lock, |
| 887 | .fsync = cifs_strict_fsync, |
| 888 | .flush = cifs_flush, |
Pavel Shilovsky | 7a6a19b | 2010-12-14 11:29:51 +0300 | [diff] [blame] | 889 | .mmap = cifs_file_strict_mmap, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 890 | .splice_read = generic_file_splice_read, |
| 891 | .llseek = cifs_llseek, |
| 892 | #ifdef CONFIG_CIFS_POSIX |
| 893 | .unlocked_ioctl = cifs_ioctl, |
| 894 | #endif /* CONFIG_CIFS_POSIX */ |
| 895 | .setlease = cifs_setlease, |
| 896 | }; |
| 897 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 898 | const struct file_operations cifs_file_direct_ops = { |
Pavel Shilovsky | 0b81c1c | 2011-03-10 10:11:05 +0300 | [diff] [blame] | 899 | /* BB reevaluate whether they can be done with directio, no cache */ |
| 900 | .read = do_sync_read, |
| 901 | .write = do_sync_write, |
| 902 | .aio_read = cifs_user_readv, |
| 903 | .aio_write = cifs_user_writev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | .open = cifs_open, |
| 905 | .release = cifs_close, |
| 906 | .lock = cifs_lock, |
| 907 | .fsync = cifs_fsync, |
| 908 | .flush = cifs_flush, |
Steve French | a994b8f | 2009-12-07 05:44:46 +0000 | [diff] [blame] | 909 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 910 | .splice_read = generic_file_splice_read, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 911 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 912 | .unlocked_ioctl = cifs_ioctl, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 913 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 914 | .llseek = cifs_llseek, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 915 | .setlease = cifs_setlease, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | }; |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 917 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 918 | const struct file_operations cifs_file_nobrl_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 919 | .read = do_sync_read, |
| 920 | .write = do_sync_write, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 921 | .aio_read = generic_file_aio_read, |
| 922 | .aio_write = cifs_file_aio_write, |
| 923 | .open = cifs_open, |
| 924 | .release = cifs_close, |
| 925 | .fsync = cifs_fsync, |
| 926 | .flush = cifs_flush, |
| 927 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 928 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 929 | .llseek = cifs_llseek, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 930 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 931 | .unlocked_ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 932 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 933 | .setlease = cifs_setlease, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 934 | }; |
| 935 | |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 936 | const struct file_operations cifs_file_strict_nobrl_ops = { |
| 937 | .read = do_sync_read, |
| 938 | .write = do_sync_write, |
Pavel Shilovsky | a70307e | 2010-12-14 11:50:41 +0300 | [diff] [blame] | 939 | .aio_read = cifs_strict_readv, |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 940 | .aio_write = cifs_strict_writev, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 941 | .open = cifs_open, |
| 942 | .release = cifs_close, |
| 943 | .fsync = cifs_strict_fsync, |
| 944 | .flush = cifs_flush, |
Pavel Shilovsky | 7a6a19b | 2010-12-14 11:29:51 +0300 | [diff] [blame] | 945 | .mmap = cifs_file_strict_mmap, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 946 | .splice_read = generic_file_splice_read, |
| 947 | .llseek = cifs_llseek, |
| 948 | #ifdef CONFIG_CIFS_POSIX |
| 949 | .unlocked_ioctl = cifs_ioctl, |
| 950 | #endif /* CONFIG_CIFS_POSIX */ |
| 951 | .setlease = cifs_setlease, |
| 952 | }; |
| 953 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 954 | const struct file_operations cifs_file_direct_nobrl_ops = { |
Pavel Shilovsky | 0b81c1c | 2011-03-10 10:11:05 +0300 | [diff] [blame] | 955 | /* BB reevaluate whether they can be done with directio, no cache */ |
| 956 | .read = do_sync_read, |
| 957 | .write = do_sync_write, |
| 958 | .aio_read = cifs_user_readv, |
| 959 | .aio_write = cifs_user_writev, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 960 | .open = cifs_open, |
| 961 | .release = cifs_close, |
| 962 | .fsync = cifs_fsync, |
| 963 | .flush = cifs_flush, |
Pavel Shilovsky | 810627a0 | 2010-03-27 02:00:49 +0000 | [diff] [blame] | 964 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 965 | .splice_read = generic_file_splice_read, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 966 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 967 | .unlocked_ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 968 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 969 | .llseek = cifs_llseek, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 970 | .setlease = cifs_setlease, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 971 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 973 | const struct file_operations cifs_dir_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | .readdir = cifs_readdir, |
| 975 | .release = cifs_closedir, |
| 976 | .read = generic_read_dir, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 977 | .unlocked_ioctl = cifs_ioctl, |
Christoph Hellwig | 3222a3e | 2008-09-03 21:53:01 +0200 | [diff] [blame] | 978 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | }; |
| 980 | |
| 981 | static void |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 982 | cifs_init_once(void *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | { |
| 984 | struct cifsInodeInfo *cifsi = inode; |
| 985 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 986 | inode_init_once(&cifsi->vfs_inode); |
Pavel Shilovsky | 1b4b55a | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 987 | init_rwsem(&cifsi->lock_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | static int |
| 991 | cifs_init_inodecache(void) |
| 992 | { |
| 993 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 994 | sizeof(struct cifsInodeInfo), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 995 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 996 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 997 | cifs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | if (cifs_inode_cachep == NULL) |
| 999 | return -ENOMEM; |
| 1000 | |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | static void |
| 1005 | cifs_destroy_inodecache(void) |
| 1006 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 1007 | /* |
| 1008 | * Make sure all delayed rcu free inodes are flushed before we |
| 1009 | * destroy cache. |
| 1010 | */ |
| 1011 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1012 | kmem_cache_destroy(cifs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | static int |
| 1016 | cifs_init_request_bufs(void) |
| 1017 | { |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 1018 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
| 1019 | #ifdef CONFIG_CIFS_SMB2 |
| 1020 | /* |
| 1021 | * SMB2 maximum header size is bigger than CIFS one - no problems to |
| 1022 | * allocate some more bytes for CIFS. |
| 1023 | */ |
| 1024 | max_hdr_size = MAX_SMB2_HDR_SIZE; |
| 1025 | #endif |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1026 | if (CIFSMaxBufSize < 8192) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
| 1028 | Unicode path name has to fit in any SMB/CIFS path based frames */ |
| 1029 | CIFSMaxBufSize = 8192; |
| 1030 | } else if (CIFSMaxBufSize > 1024*127) { |
| 1031 | CIFSMaxBufSize = 1024 * 127; |
| 1032 | } else { |
| 1033 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
| 1034 | } |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1035 | /* |
| 1036 | cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", |
| 1037 | CIFSMaxBufSize, CIFSMaxBufSize); |
| 1038 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | cifs_req_cachep = kmem_cache_create("cifs_request", |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 1040 | CIFSMaxBufSize + max_hdr_size, 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1041 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | if (cifs_req_cachep == NULL) |
| 1043 | return -ENOMEM; |
| 1044 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1045 | if (cifs_min_rcv < 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | cifs_min_rcv = 1; |
| 1047 | else if (cifs_min_rcv > 64) { |
| 1048 | cifs_min_rcv = 64; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1049 | cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1052 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
| 1053 | cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1055 | if (cifs_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | kmem_cache_destroy(cifs_req_cachep); |
| 1057 | return -ENOMEM; |
| 1058 | } |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1059 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | almost all handle based requests (but not write response, nor is it |
| 1061 | sufficient for path based requests). A smaller size would have |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1062 | been more efficient (compacting multiple slab items on one 4k page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | for the case in which debug was on, but this larger size allows |
| 1064 | more SMBs to use small buffer alloc and is still much more |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1065 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | alloc of large cifs buffers even when page debugging is on */ |
| 1067 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1068 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1069 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | if (cifs_sm_req_cachep == NULL) { |
| 1071 | mempool_destroy(cifs_req_poolp); |
| 1072 | kmem_cache_destroy(cifs_req_cachep); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1073 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1076 | if (cifs_min_small < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | cifs_min_small = 2; |
| 1078 | else if (cifs_min_small > 256) { |
| 1079 | cifs_min_small = 256; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1080 | cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | } |
| 1082 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1083 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
| 1084 | cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1086 | if (cifs_sm_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | mempool_destroy(cifs_req_poolp); |
| 1088 | kmem_cache_destroy(cifs_req_cachep); |
| 1089 | kmem_cache_destroy(cifs_sm_req_cachep); |
| 1090 | return -ENOMEM; |
| 1091 | } |
| 1092 | |
| 1093 | return 0; |
| 1094 | } |
| 1095 | |
| 1096 | static void |
| 1097 | cifs_destroy_request_bufs(void) |
| 1098 | { |
| 1099 | mempool_destroy(cifs_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1100 | kmem_cache_destroy(cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | mempool_destroy(cifs_sm_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1102 | kmem_cache_destroy(cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | static int |
| 1106 | cifs_init_mids(void) |
| 1107 | { |
| 1108 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 1109 | sizeof(struct mid_q_entry), 0, |
| 1110 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (cifs_mid_cachep == NULL) |
| 1112 | return -ENOMEM; |
| 1113 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1114 | /* 3 is a reasonable minimum number of simultaneous operations */ |
| 1115 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1116 | if (cifs_mid_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | kmem_cache_destroy(cifs_mid_cachep); |
| 1118 | return -ENOMEM; |
| 1119 | } |
| 1120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | return 0; |
| 1122 | } |
| 1123 | |
| 1124 | static void |
| 1125 | cifs_destroy_mids(void) |
| 1126 | { |
| 1127 | mempool_destroy(cifs_mid_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1128 | kmem_cache_destroy(cifs_mid_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | } |
| 1130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | static int __init |
| 1132 | init_cifs(void) |
| 1133 | { |
| 1134 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | cifs_proc_init(); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1136 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
Steve French | 0eff0e2 | 2011-02-24 05:39:23 +0000 | [diff] [blame] | 1137 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
Steve French | 4ca9c19 | 2005-10-10 19:52:13 -0700 | [diff] [blame] | 1138 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
| 1139 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
Steve French | 0eff0e2 | 2011-02-24 05:39:23 +0000 | [diff] [blame] | 1140 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | /* |
| 1142 | * Initialize Global counters |
| 1143 | */ |
| 1144 | atomic_set(&sesInfoAllocCount, 0); |
| 1145 | atomic_set(&tconInfoAllocCount, 0); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1146 | atomic_set(&tcpSesAllocCount, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | atomic_set(&tcpSesReconnectCount, 0); |
| 1148 | atomic_set(&tconInfoReconnectCount, 0); |
| 1149 | |
| 1150 | atomic_set(&bufAllocCount, 0); |
Steve French | 4498eed5 | 2005-12-03 13:58:57 -0800 | [diff] [blame] | 1151 | atomic_set(&smBufAllocCount, 0); |
| 1152 | #ifdef CONFIG_CIFS_STATS2 |
| 1153 | atomic_set(&totBufAllocCount, 0); |
| 1154 | atomic_set(&totSmBufAllocCount, 0); |
| 1155 | #endif /* CONFIG_CIFS_STATS2 */ |
| 1156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | atomic_set(&midCount, 0); |
| 1158 | GlobalCurrentXid = 0; |
| 1159 | GlobalTotalActiveXid = 0; |
| 1160 | GlobalMaxActiveXid = 0; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1161 | spin_lock_init(&cifs_tcp_ses_lock); |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 1162 | spin_lock_init(&cifs_file_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | spin_lock_init(&GlobalMid_Lock); |
| 1164 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 1165 | #ifdef CONFIG_CIFS_SMB2 |
| 1166 | get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE); |
| 1167 | #endif |
| 1168 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1169 | if (cifs_max_pending < 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | cifs_max_pending = 2; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1171 | cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); |
Pavel Shilovsky | 10b9b98 | 2012-03-20 12:55:09 +0300 | [diff] [blame] | 1172 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
| 1173 | cifs_max_pending = CIFS_MAX_REQ; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1174 | cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", |
| 1175 | CIFS_MAX_REQ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | } |
| 1177 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1178 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
| 1179 | if (!cifsiod_wq) { |
| 1180 | rc = -ENOMEM; |
| 1181 | goto out_clean_proc; |
| 1182 | } |
| 1183 | |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1184 | rc = cifs_fscache_register(); |
| 1185 | if (rc) |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1186 | goto out_destroy_wq; |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | rc = cifs_init_inodecache(); |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1189 | if (rc) |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1190 | goto out_unreg_fscache; |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1191 | |
| 1192 | rc = cifs_init_mids(); |
| 1193 | if (rc) |
| 1194 | goto out_destroy_inodecache; |
| 1195 | |
| 1196 | rc = cifs_init_request_bufs(); |
| 1197 | if (rc) |
| 1198 | goto out_destroy_mids; |
| 1199 | |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1200 | #ifdef CONFIG_CIFS_UPCALL |
| 1201 | rc = register_key_type(&cifs_spnego_key_type); |
| 1202 | if (rc) |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1203 | goto out_destroy_request_bufs; |
| 1204 | #endif /* CONFIG_CIFS_UPCALL */ |
| 1205 | |
| 1206 | #ifdef CONFIG_CIFS_ACL |
| 1207 | rc = init_cifs_idmap(); |
| 1208 | if (rc) |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1209 | goto out_register_key_type; |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1210 | #endif /* CONFIG_CIFS_ACL */ |
| 1211 | |
| 1212 | rc = register_filesystem(&cifs_fs_type); |
| 1213 | if (rc) |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1214 | goto out_init_cifs_idmap; |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1215 | |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1216 | return 0; |
| 1217 | |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1218 | out_init_cifs_idmap: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1219 | #ifdef CONFIG_CIFS_ACL |
| 1220 | exit_cifs_idmap(); |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1221 | out_register_key_type: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1222 | #endif |
| 1223 | #ifdef CONFIG_CIFS_UPCALL |
| 1224 | unregister_key_type(&cifs_spnego_key_type); |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1225 | out_destroy_request_bufs: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1226 | #endif |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1227 | cifs_destroy_request_bufs(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1228 | out_destroy_mids: |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1229 | cifs_destroy_mids(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1230 | out_destroy_inodecache: |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1231 | cifs_destroy_inodecache(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1232 | out_unreg_fscache: |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1233 | cifs_fscache_unregister(); |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1234 | out_destroy_wq: |
| 1235 | destroy_workqueue(cifsiod_wq); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1236 | out_clean_proc: |
| 1237 | cifs_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | return rc; |
| 1239 | } |
| 1240 | |
| 1241 | static void __exit |
| 1242 | exit_cifs(void) |
| 1243 | { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1244 | cifs_dbg(NOISY, "exit_cifs\n"); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1245 | unregister_filesystem(&cifs_fs_type); |
Igor Mammedov | 78d31a3 | 2008-04-24 12:56:07 +0400 | [diff] [blame] | 1246 | cifs_dfs_release_automount_timer(); |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1247 | #ifdef CONFIG_CIFS_ACL |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1248 | exit_cifs_idmap(); |
| 1249 | #endif |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1250 | #ifdef CONFIG_CIFS_UPCALL |
| 1251 | unregister_key_type(&cifs_spnego_key_type); |
| 1252 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | cifs_destroy_request_bufs(); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1254 | cifs_destroy_mids(); |
| 1255 | cifs_destroy_inodecache(); |
| 1256 | cifs_fscache_unregister(); |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1257 | destroy_workqueue(cifsiod_wq); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1258 | cifs_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1262 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | MODULE_DESCRIPTION |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 1264 | ("VFS to access servers complying with the SNIA CIFS Specification " |
| 1265 | "e.g. Samba and Windows"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | MODULE_VERSION(CIFS_VERSION); |
| 1267 | module_init(init_cifs) |
| 1268 | module_exit(exit_cifs) |